4 Installation instructions CC8 roof-top air-conditioning system
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10. Secure the assembled air ducting frame through the intermediate ceiling to the vehicle roof bows with self-tapping
screws and fan-disk washers. Fit shims between ducting frame and intermediate ceiling to compensate for any
unevenness if necessary.
11. If necessary, secure at additional points with mounting brackets or plugs you make yourself.
12. Seal the existing cut-outs for lights in the intermediate ceiling.
13. Align the rear central air duct with air ducting frame and air distribution panel. Mark the mounting holes on air ducting
frame and connectors.
14. Drill the mounting holes with a diameter of 7.0 mm in air ducting frame, panel transition elements and frame
connectors. (The predrilled holes in the central and end air ducts can be used as a template.)
NOTE
Before drilling holes, ensure that the gap between the individual ducting elements is as
small as possible and that the connector is located in the centre of the air ducting
frame.
15. Affix strips of expanded rubber under the ducting frame / connecting elements to prevent vibration (see Fig. 410).
16. Secure the central air ducts to air ducting frame through the air distribution panel with plastic clips.
17. Fit additional central and end air ducts as described in steps 12 to 14.
NOTE
The air ducting system installation kit includes additional plastic expanding rivets which
can also be used to secure the air ducting system in position if gaps form at the sides,
for example due to stress in the air duct covers.
CAUTION
When installing the cab lights in the air ducting system, the openings in the air duct covers
must be reinforced or reinforced extension kits (part No. 900 1161) and a reinforced end air
duct (part No. 900 1288) with suitable interior lights (part No. 64055) must be used instead.
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